Single and double ionization of H/sub 2/ by electrons and protons

Journal Article · Sun May 15 00:00:00 EDT 1988 · Phys. Rev. A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.37.3697· OSTI ID:5161253

Edwards, A K; Wood, R M; Beard, A S; Ezell, R L

The single- and double-ionization cross sections of H/sub 2/ produced by fast-electron bombardment have been measured. The electrons had selected energies between 750 and 3500 keV/amu. The results are compared to previously reported data from this laboratory for equivelocity protons on H/sub 2/. The ratio R of double-to-single-ionization cross sections is about a factor of 2 greater for electrons than for protons. The difference occurs because of differences in both the single- and double-ionization cross sections. At 750 keV/amu, the single-ionization cross section produced by electrons is 0.83 +- 0.04 times that produced by protons. At the same velocity, the double-ionization cross section produced by electrons is 2.25 +- 0.35 times that produced by protons. The results from the H/sub 2/ target are compared to results from a helium target, and marked similarities are observed.

• Research Organization: Department of Physics and Astronomy, University of Georgia, Athens, Georgia 30602
• OSTI ID: 5161253
• Journal Information: Phys. Rev. A; (United States), Journal Name: Phys. Rev. A; (United States) Vol. 37:10; ISSN PLRAA
• Country of Publication: United States
• Language: English

Related Subjects

640304* -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
COLLISIONS
CROSS SECTIONS
DATA
ELECTRON COLLISIONS
ELECTRON-MOLECULE COLLISIONS
ELEMENTS
EXPERIMENTAL DATA
FINAL-STATE INTERACTIONS
HYDROGEN
INFORMATION
INTERACTIONS
ION COLLISIONS
ION-MOLECULE COLLISIONS
IONIZATION
MOLECULE COLLISIONS
NONMETALS
NUMERICAL DATA